Asymmetric cycloaddition routes to both enantiomers of trans-9,10-dihydro-9,10-ethanoanthracene-11,12-dicarboxylic acid
作者:Linda Thunberg、Stig Allenmark
DOI:10.1016/s0957-4166(03)00172-1
日期:2003.5
S)-enantiomer and di-(+)-iso-menthyl fumarate the (+)-(R,R)-enantiomer of the acid. The other fumarates, obtained from (−)-borneol, (+)-fenchol and (−)-isopulegol, likewise gave the (−)-(S,S)-enantiomer of the acid. The absolute stereochemistry of the products was confirmed via a single crystal X-ray crystallographic structure determination of the brucine salt of the (−)-(S,S)-enantiomer.